<template>
  <!-- 判断值是否存在不存在将其隐藏 -->
	<view v-if="goods_info.goods_name" class="goods_detail_container">
    <!-- 轮播图区域 -->
	  <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
	    <swiper-item v-for="(item,i) in goods_info.pics" :key="i">
	      <image :src="item.pics_big" @click="preview(i)"></image>
	    </swiper-item>
	  </swiper>
    
    <!-- 商品信息区域 -->
    <view class="good-info-box">
      <!-- 商品价格 -->
       <view class="price">￥{{goods_info.goods_price}}</view>
       <!-- 商品信息主题区域 -->
       <view class="goods-info-body">
         <!-- 商品的名字 -->
         <view class="goods-name">{{goods_info.goods_name}}</view>
         <!-- 收藏 -->
         <view class="favi">
           <uni-icons type="star" size="17" color="gray"></uni-icons>
           <text>收藏</text>
         </view> 
       </view>
       <view class="yf">快递: 免运费</view>
    </view>
    
    <!-- rich-text 渲染带有html标签的富文本 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
    <!-- 商品导航组件区域 -->
    <view class="goods_nav">
       <!-- fill 控制右侧按钮的样式 -->
        <!-- options 左侧按钮的配置项 -->
        <!-- buttonGroup 右侧按钮的配置项 -->
        <!-- click 左侧按钮的点击事件处理函数 -->
        <!-- buttonClick 右侧按钮的点击事件处理函数 -->
      <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
    </view>
	</view>
</template>

<script>
  import {mapState,mapMutations,mapGetters} from 'vuex'
	export default {
    computed:{
      ...mapState('m_cart',[]),
      ...mapGetters('m_cart',['total'])
    },
    // 监听器
    watch:{
      // total(newVal){
      // const findResult = this.options.find(x=>x.text==='购物车')
      // if(findResult){
      //   findResult.info=newVal
      // }
      // }
      total:{
        handler(newVal){
          const findResult = this.options.find(x=>x.text==='购物车')
          if(findResult){
            findResult.info=newVal
          }
        },
        // 页面初次加载之后立即调用
        immediate:true
      }
    },
		data() {
			return {
        // 商品详情对象
				goods_info:{},
         // 左侧按钮组的配置对象
              options: [ {
                    icon: 'shop',
                    text: '店铺',
                }, {
                    icon: 'cart',
                    text: '购物车',
                    info: 0
                }],
                    // 右侧按钮组的配置对象
                buttonGroup: [{
                  text: '加入购物车',
                  backgroundColor: '#ff0000',
                  color: '#fff'
                },
                {
                  text: '立即购买',
                  backgroundColor: '#ffa200',
                  color: '#fff'
                }
                ]
			};
		},
    onLoad(options) {
      // 获取商品id
     const goods_id= options.goods_id
     // 调用请求商品详情的方法
     this.getGoodsDetail(goods_id)
    },
    methods:{
      ...mapMutations('m_cart',['addToCart']),
      // 请求商品详情数据的方法
     async getGoodsDetail(goods_id){
       const {data:res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id:goods_id})
       if(res.meta.status!==200) return uni.$showMsg()
       // 使用字符串的 replace() 方法，为 img 标签添加行内的 style 样式，从而解决图片底部空白间隙的问题
       res.message.goods_introduce= res.message.goods_introduce.replace(/<img /g,'<img style="display:block;"').replace(/webp/g,'jpg')
       
       this.goods_info=res.message
      },
      //实现轮播图的预览效果
      preview(i){
        // 调用以下方法预览图片
        uni.previewImage({
          // 预览时默认显示图片的索引  点击那个就从那个图片预览
          current:i,
          //map(x>x.图片)循环
          urls:this.goods_info.pics.map(x=>x.pics_big)
        })
      },
      //跳转到购物车页面
      onClick(e){
        if(e.content.text==='购物车'){
        uni.switchTab({
          url:'/pages/cart/cart'
        })
        }
      },
      //加入购物车
      buttonClick(e){
       if(e.content.text==='加入购物车'){
         //组织商品信息对象
          // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
 
          const goods ={
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo:this.goods_info.goods_small_logo,
            goods_state:true
          }
         // 调用addToCart 方法
         this.addToCart(goods)
       }
      }
    }
	}
</script>

<style lang="scss">
swiper{
  height: 750rpx;
  image{
    width: 100%;
    height: 100%;
  }
}
.good-info-box{
   padding: 10px;
   padding-right: 0;
  .price{
       color: #C00000;
       margin: 10px 0;
       font-size: 18px;
  }
  .goods-info-body{
    display: flex;
    justify-content: space-between;
    .goods-name{
      font-size: 13px;
      margin-right: 10px;
    }
    .favi{
      width: 120px;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: gray;
      border-left: 1px solid #efefef;
    }
  }
  .yf{
    font-size: 12px;
    color: gray;
    margin: 10px 0;
  }
}
.goods_nav{
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}
.goods_detail_container{
  padding-bottom: 50px;
}
</style>
